73a16ec2fc5f3098f7a4c61e8797bcd04ac5d366bffc96fce95c152a47d0dea5

Analysis

max time kernel
148s
max time network
151s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-01-2024 17:25

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General

Target

2024-01-25_2e08a04cf694a9f07ecf6d16121ef3fc_cryptolocker.exe
Size

56KB
MD5

2e08a04cf694a9f07ecf6d16121ef3fc
SHA1

5c8f711392db144f7283651e4e12419f9339cdfe
SHA256

73a16ec2fc5f3098f7a4c61e8797bcd04ac5d366bffc96fce95c152a47d0dea5
SHA512

77ad0a811cbe2b850b0ba1ad64f99ca76ad68117427f1192edfb4fb2796e8f66e1166bc874aae0b85f5ba4f1f1f5a06d19b560c884257b7d0d724ba9bae1a982
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61PTH:BbdDmjr+OtEvwDpjM1

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2596-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0008000000012262-11.dat	CryptoLocker_rule2
behavioral1/memory/2596-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2664-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2664-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2596-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2664-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2664-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2596-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0008000000012262-11.dat	UPX
behavioral1/memory/2596-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2664-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2664-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid	Process
2664	asih.exe

Loads dropped DLL 1 IoCs

Processes:

2024-01-25_2e08a04cf694a9f07ecf6d16121ef3fc_cryptolocker.exe

pid	Process
2596	2024-01-25_2e08a04cf694a9f07ecf6d16121ef3fc_cryptolocker.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-01-25_2e08a04cf694a9f07ecf6d16121ef3fc_cryptolocker.exe

description	pid	Process	procid_target
PID 2596 wrote to memory of 2664	2596	2024-01-25_2e08a04cf694a9f07ecf6d16121ef3fc_cryptolocker.exe	28
PID 2596 wrote to memory of 2664	2596	2024-01-25_2e08a04cf694a9f07ecf6d16121ef3fc_cryptolocker.exe	28
PID 2596 wrote to memory of 2664	2596	2024-01-25_2e08a04cf694a9f07ecf6d16121ef3fc_cryptolocker.exe	28
PID 2596 wrote to memory of 2664	2596	2024-01-25_2e08a04cf694a9f07ecf6d16121ef3fc_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-25_2e08a04cf694a9f07ecf6d16121ef3fc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_2e08a04cf694a9f07ecf6d16121ef3fc_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2596
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2664

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
57KB

MD5
95a62108221c3b233e8892f2f6e2f417

SHA1
ddaddf3093ea7ee0e8591fbdbbc6d09731be95c7

SHA256
62aa634fb7ffb9f760dd3e4d65d6aee9969abdbbae6f4a03fa6b2ebe03742a6a

SHA512
804f4eef7719f4ed94b49cc830c6670f2dc930c4493b6057d0600f64887a215b71247d9db67928572972b4a886a6316b0c28ac74a1edeeecd8f24fa337f81416

Download Submit
memory/2596-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2596-1-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2596-3-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2596-2-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2596-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2664-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2664-19-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2664-18-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2664-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download